Rebound check



1,641,381 p E, R. GODFREY I REBOUND CHECK Filed April 2, 1926 Fatented Sept. 6, 1927.

s'res EDWARD R. GODFREY, Oli' ANDERSON, INDIANA, ASSIGNOB, BY MESNE ASSIGNMENTS, T DELCO-REMY CORPORATION, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

REBOUND CHECK.

Application filed Aprl 2, 1926. Serial No. 99.394.

This invention relates to rebound checks for automobiles nd other vehicles which have a frame or ody supported by springs upon the road wheel axles.

ti One of the objects of the invention is to provide certain improvenamts in the by draulic type rebound check such as dis closed inv the copending application of George W. Elsey, Serial No. 99.371. fi ed to April 2, i926 (RY-28J9), and more particularly to provide for the adaptation ot'a rebound check to ditl'ercnt makes of vehicles by the substitution of certain parts for others which may be removed without disassembling the structure.

Further objects and advantages of the resent invention will be apparent from the ollowing' descriptitm, reference being had to .the accompanying drawings, wherein a preferred form of embodiment of the present invention is clearly shown.

- In the drawings:

Fig. l is a diagrammatic fragmentary side View showing the vehicle frame and axle and a form of the present invention applied thereto.- i

Fig. 2 is a'longitudinal sectional view of the rebound check.

Fig. 3 is a sectional view on the line 3-43 of-Fig. 2.

Fig. 4 is a fragmentary view, partly in section showing the method of (ounecting the rebound check operating arm with the vehicle axle.

85 Referring to Fig 1. 20 designates the frame member of a vehicle which is supported by springs, one of which 1s shown at 21 upon an axle 22 to which the road wheels" are connected, The rebound check includes 40 a bracket 23 which is attached in any suitable manner either to the axle member or to the frame member and preferably to the latter. The bracket 23 supports and provides a housing for an oscilh'ilable part or 15 lever 24 which is attached by a screw 25 to a shaft 26. One end of the shaft 26 projects through a side wall of the bracket 23 and is connected with a lever 27. Referring to V Fig. 4 the free end of the lever 27 is aper- 50 tured to.provide recesses 28 and 29 which are separated by an annular ledge having a segmental-spherical surface 30. The lever 27 is connected with the axle 2'2 by a cable 3l'having its lower end attached to a clamp 5 bolt 32 which passes through a clam 'iing member 44 which is located adjacent the .axially of the piston and having its upper washer 33 and has a threaded end 34.0001)- crating with a nut 35. When the nut 35 is tightened the clamping members 32 and 33 will securely embrace the lower flange of the axle 22. The upper end of the cable 31 is attached to a cylindrical metal head 36 which is received within a recess provided by spherical member 37 having an aperture 38 for receiving the cable 31. The member 37 is received by the spherical bearing sur face 30. To exclude dirt, the recess 28 is closed by cover disc 39.

The scparationot' the f ame 20 from the axle 2.2. due to the rebound of the vehicle, is checked or retarded by apparatus which coacts with the oscillatable member or lever 24. This apparatus includes a piston 40 which is slidablc within a liquid receiving cylinder 41 attached to the bracket 23. The piston 40 is provided with a 'wear piece 40 engageahle with the leverQ l. and with apertures 42 therethrongh. Obviously downward movement of the piston is produced by the clockwise rotation'of the lever 24 as viewed in the drawings. and upward move ment of the piston is produced by a spring 43 hearing at its lower end against the bottom wall of the cylinder ll andbearing at its upper end against an annular valve seat passage 42. An annular valve member 45 cooperates with the valve seat 44 and is urged toward the closed position by a spring 46 hearing at its upper end against the valve 45 and its lower end against a cup-shaped washer 47. Downward movement of the usher 47 is restrained by engagement of the washer with an,nnnular shoulder 48 which is providcd'by a tube 49 located '5 end threaded into the head of the piston. The central passage 50 of the tube 48 is connected by side openings 5'] with the space surrounded b the valve seat 44. In this manner the tube 49 provides a bypass loo around the check valve member 45. The tube 49 also provides a guide for the valve membcr lfi.

A suitable rebound retarding ll(lll(l is poured into through an opening wiich is closed by a plug (it).

The [low of liquid through the passage 50 is controlled by metering pin 52 which extcnds through the tube 49 and is attached at its lower end to a plug 53 threaded into the no botiom well. of the cylinder 421i, lit is there fore epporent eheit the metering pin 52 may be removed from the rebound check While the other parts thereof remain assembled.

it will be noted bllfitl; the metering pin is not uniform in diameterbut that its cross sectional dimensions ere variable. This feature ispresent for the purpose OfVfiTlably restricting the passage of liquid .through the metering orifice fit) in order that of the tapered metering pin shown, but.

other pins having different longitudinal sectional contours may be substituted for the one shown in order. to roduce a. checking action best suited to t e particular vehiclc to which the rebound check 1s attached.

As explained, the metering pin may be changed without dlscsecmblmg the other ports of the apparatus.

. In order to reduce the noise produced by the flow of liquid through the metering passage, the tube 49 has o smooth central passage of substantially uniform diameter and the wall of t. e tube is relatively thick. The annular puenge between the pin and the interior surfucc of the tube is one which greduolly increases in cross sectional dimensions so that there is no sudden change in velocity of ihc liquid as it is forced through the motoring passage. Since the chnngc in velocity is very gradual. the liquid will not. surge or swirl or pound the sides of the metring tube to an extent such as to produce noise. Furthermore, there is less tendency for u thick-walled tube to vibrate to an extent Huilicient to produce objectionable sound. I

While the form of embodiment of the present invcnlion as herein disclosed, constitutes u preferred fol-unit is to be understood that other forms might be adopted, nil coming Within the scope of the claims which follow.

Wl'mt is claimed is as follows:

i. A rebound check for e vehicle having frame and uxlc members, comprising in combination, :1. bracket adopted to be .et teacher to one of sold vehicle members; on nee l chic supported by the bracket;

menus for connecting seioi port with the other vehicle menibee; at fluid contmmng cylinder ettoched to loreclaeg; e piston operated in one direction by send pert, one. having a passage thercthrough; n. spring for moving the piston in the olahcr dirau tion; u check valve for said, piston passage; 2. tube attached to the pi eon and providing it b y-pass around the checlz: vnlve and providing e guide for the check valve; 21 snring; encircling the tube for holding the check "al ve in position; end a metering pin detuchabl .zificlli'fiti to the cylinder and extend:- ing Witnin the tube. 1

2. A rebound check for a vehicle having fruinc and axle members, comprising in combination, a bracke adopted to attached "to. one of said vehicle members; on oscillutable part supported by the bracket; means for connectmg said port with the other vehicle member; s fluid containing cylinder attached to the brncket; a piston operated in one dircceion by said port, and bovine, e, passage therethrough; 2"; spring for moving the piston in the other direction; e. check valve for said. pieton passage and including an annular valve member; 2 "tube attached to the, piston axially thereof and providing a. bypass around the check valve and extending through the valve member to provide 9. guide therefor; '3. spring surrounding the tube end urging the valve memlo ei into closed; position; end a. metering pin detechably secured-to the cylinder and extending within the tube. i

3. A rebound check for a vehicle having frame and axle members, comprising in combination, a bracket adopted to be ettached to one of the seid vehicle members; on oscillatoble pert supported by the bracket; means for connecting said "port with the other vehicle member; o fluid conteining cylinder attached to the bracket; :1 piston operated in one direction of said port, and having e. passeg'e therethrough; an annular valve seat adjacent said pistonpasse e; a. spring for moving the piston in the ot ier direction and for holding the valve seat in position; an unmilar-mlvo member lllltl cooperating with said seat; :1 tubular guide for said valve member attached to the piston.

and extending through the valve seat and providing a. bypass around the valve; 9. :pring encircling the tube for holding the check valve in position; and a metering" pin. dctuchebly secured to the cylinder and er.- tending Within the tube.

In testimony whereof 1 hereto alfin my signeturc.

.eniveen oonnenir. 

